The specific embodiment
Hereinafter, will be by embodiments of the invention be described with reference to the accompanying drawings.
Fig. 1 is the block diagram that illustrates according to the structure example of the motoring condition assessment apparatus of the embodiment of the invention.This motoring condition assessment apparatus 100 is mobile units, and this equipment realizes suppressing the consumption of fuel deterioration by the assessment of driver via the motoring condition that uses propulsive effort to carry out as standard.This motoring condition assessment apparatus 100 comprises controller 1.The input that this controller 1 receives from vehicle speed sensor 2 and accel sensor 3, and control signal exported to audio output apparatus 4 and display equipment 5.These assemblies are by being coupled such as controller local area network (CAN), local interconnect net vehicle-mounted LAN such as (LIN).
Controller 1 provides the computing machine of central process unit (CPU), random-access memory (ram), read-only memory (ROM) (ROM) etc.For example, controller 1 is stored in ROM with propulsive effort estimation unit 10, threshold setting device 11, propulsive effort appropriateness and is determined device 12 and propulsive effort information notification apparatus 13 corresponding programs, and makes each the corresponding processing in CPU execution and these devices.
Vehicle speed sensor 2 is the sensors that are used for measurement of vehicle speed.For example, vehicle speed sensor 2 is magnetoresistive elements of installing on each wheel, and reads the changes of magnetic field as the magneto-resistive magnet that rotates with wheel.By extracting the magnetic resistance of such conduct and the proportional impulse singla of rotative speed, vehicle speed sensor 2 detects the rotative speed and the car speed of wheel, and detected speed is exported to controller 1.
Accel sensor 3 is the sensors that are used to measure accelerator opening.For example, accel sensor 3 is the potentiometers that are used to detect the volume under pressure of acceleration pedal, and detected value is exported to controller 1.
Audio output apparatus 4 is the devices that are used for the various information of audiofrequency output.For example, audio output apparatus 4 is vehicle-borne loud speaker or buzzer phone, and the output warning tones, or according to the vocal guidance of the control signal of slave controller 1 output.
Display equipment 5 is the devices that are used to show various information.For example, display equipment 5 is indicator lamps, the indicator lamp that opens or closes according to the control signal of controller 1 output and the Vehicular display device of display graphics data or text data etc.
Then, the various devices that explanation is comprised in controller 1.
Propulsive effort estimation unit 10 is to be used to assess by chaufeur carry out the device that the propulsive effort that is used for powered vehicle (driving power) that is produced is operated in driving.For example, based on the output of accel sensor 3, the corresponding propulsive effort of volume under pressure of the accelerator that 10 assessments of propulsive effort estimation unit and chaufeur apply.
Propulsive effort obtains than ÷ tire radius by the moment of torsion * final gear that for example obtains from transmission gear.In addition, the moment of torsion that obtains from transmission gear be by, for example, engine torque * transmission gear ratio * torque converter ratio * power transmission efficiency obtains.
For each vehicle, final gear ratio, tire radius and power transmission efficiency are predefined steady state values.Engine torque is according to quickening the value that aperture, engine rotation number etc. change.Transmission gear ratio and torque converter ratio are according to accelerator opening, gear etc. and the value that changes.
Usually, engine torque, transmission gear ratio and torque converter are than being for Control Engine and change-speed box and the value that calculates according to the output of accel sensor 3, by engine ECU (not shown).Propulsive effort estimation unit 10 is by carrying out at controller 1 place and assessing propulsive effort by engine ECU execution with the similar calculating of the calculating that obtains engine torque, transmission gear ratio and torque converter ratio.
Propulsive effort estimation unit 10 can be after the value that receives from engine torque engine ECU, that calculate in engine ECU, transmission gear ratio and torque converter ratio, carry out the calculating that is used to assess propulsive effort by using these to be worth, and also can shift the propulsive effort that in engine ECU, calculates by as-is condition.
In addition, after chaufeur was depressed accelerator, at (fuel be consumed before) before the actual generation of driven by engine power, propulsive effort estimation unit 10 was assessed uncreated driven by engine power immediately.Reason be by after the propulsive effort information notification apparatus 13 that will describe, prevent by chaufeur and to quicken (stopping more promptly too to press down accelerator), can increase and avoid the fuel quantity that consumes.
Threshold setting device 11 is set and is used for determining by the propulsive effort of propulsive effort estimation unit 10 assessments suitable threshold whether.For example, during each propulsive effort estimation unit 10 assessment propulsive efforts, come setting threshold based on the output of vehicle speed sensor 2.
This threshold value is a maximum acceptable value in the propulsive effort of thinking fit, and, for example, multiply by maximum acceptable acceleration figure by vehicle weight and obtain, wherein in each car speed grade, should be considered to suitable by the acceptable acceleration figure of maximum.Based on running environment come in advance to determine between car speed and maximum acceptable acceleration figure or the propulsive effort corresponding relation (for example, traffic conditions based on this 0vehicle marketing area is determined this relation, and in the area that such repetition short distance drives, this maximum acceptable value is set to low relatively value.As a result, compare with other areas, under the situation of relatively little accelerator pedal, the propulsive effort of assessment exceeds threshold value), and be stored among ROM etc. with the form of look-up table.In addition, vehicle weight is the value of setting in advance that is used for each vehicle.
Fig. 2 is the exemplary example that the diagram of curves of look-up table content is shown.Vertical axis illustrates propulsive effort, and lateral shaft illustrates car speed, and solid line TH illustrates the transition of threshold value.
In the diagram of curves of Fig. 2, when car speed when 0 (km/h) is increased to V1 (km/h), threshold value is with the constant increment rate value of being increased to T1, and after this, retention value T1 becomes V2 (km/h) up to car speed, then, little by little reduce up to car speed with the changing down of three phases and become V3 (km/h).
Therefore, by using propulsive effort (the perhaps acceleration that calculates divided by vehicle weight by propulsive effort) as the standard that is used to determine to exist the consumption of fuel deterioration, motoring condition assessment apparatus 100 can shared the look-up table that corresponding relation between threshold value and the car speed is shown between a plurality of vehicles.This is because propulsive effort is to have reflected the value that drives feature (driving efficiency of powertrain system, accelerating performance and for the different gear shift line of each vehicle or drive manner, gear, car speed etc.).
The propulsive effort appropriateness determines whether device 12 definite propulsive efforts by 10 assessments of propulsive effort estimation unit are suitable, will by the propulsive effort of propulsive effort estimation unit 10 assessment with compare by threshold setting device 11 preset threshold, and determine that propulsive effort is excessive when being equal to or greater than threshold value becoming when the driving of assessing.
Propulsive effort information notification apparatus 13 is the equipment that is used for the driver information relevant with propulsive effort, and for example, export by the propulsive effort of propulsive effort estimation unit 10 assessments and the magnitude relationship between passing threshold setting device 11 preset threshold by using audio output apparatus 4 and display equipment 5.
Fig. 3 is the example that the figure of the propulsive effort of assessment and the magnitude relationship between the threshold value is shown.In Fig. 3 A, dotted line L1 illustrates the level of threshold value, and gray area R illustrates the relative size of the propulsive effort of assessment with respect to threshold value.Fig. 3 A illustrates this moment the propulsive effort of assessment less than threshold value, and in the level of threshold value about 80%.
In addition, in Fig. 3 B, vertical axis illustrates propulsive effort, lateral shaft illustrates the time, dotted line L2 illustrates threshold level, and curve G illustrates the transition of the propulsive effort of assessment with respect to the relative size of threshold value, and mark C illustrates the relative size of the propulsive effort of assessment with respect to threshold value.The propulsive effort that Fig. 3 B illustrates the assessment that is lower than threshold value is increased to or surpasses threshold value, and drops to the state that is lower than threshold value once more.
Propulsive effort information notification apparatus 13 uses propulsive effort to come presentation information as standard.In addition, propulsive effort information notification apparatus 13 can come presentation information as standard by use quickening (value that obtains divided by vehicle weight by propulsive effort).
In addition, when the propulsive effort of assessment becomes when being equal to or greater than threshold value, propulsive effort information notification apparatus 13 can intermittently be exported short alarm tone with predetermined space, and when the propulsive effort of assessment and the difference between the threshold value when becoming big, by shortening at interval the propulsive effort of auditory notice chaufeur assessment and the magnitude relationship between the threshold value.
In addition, when the propulsive effort appropriateness determines that device 12 determines that the propulsive effort of assessment is equal to or greater than threshold value and therefore propulsive effort is excessive, propulsive effort information notification apparatus 13 can make energy-saving indicating lamp (eco lamp) flicker of installing on gauge panel, perhaps can open this energy-saving indicating lamp with redness.In addition, when the propulsive effort of assessment and the difference between the threshold value when becoming big, propulsive effort information notification apparatus 13 can shorten flicker at interval, so that chaufeur is visually recognized the propulsive effort of assessment and the magnitude relationship between the threshold value, and need not to stare at energy-saving indicating lamp.
In addition, when the propulsive effort of assessment during less than threshold value, propulsive effort information notification apparatus 13 can be closed energy-saving indicating lamp or be opened energy-saving indicating lamp with green.This energy-saving indicating lamp can be constructed with an excessive energy-saving indicating lamp of indication propulsive effort in a plurality of modes and indicate another suitable energy-saving indicating lamp of propulsive effort.
Next, with reference to figure 4, explanation is carried out by motoring condition assessment apparatus 100, suppress the process (hereinafter, " acceleration process of inhibition ") that chaufeur excessively quickens by driver propulsive effort information.Fig. 4 illustrates the diagram of circuit that quickens process of inhibition.Motoring condition assessment apparatus 100 is repeatedly carried out such acceleration process of inhibition with the predetermined cycle.
At first, the output signal that controller 1 receives from vehicle speed sensor 2 and accel sensor 3, and detect car speed and accelerator opening (step S1) this moment.
Then, based on detected accelerator opening at the moment, by propulsive effort estimation unit 10, controller 1 assessment makes the propulsive effort (step S2) that this vehicle advances.
In addition, based on detected car speed at the moment be stored in the look-up table of ROM, passing threshold setting device 11, controller 1 extract and set and be used for the threshold value (step S3) that compares with propulsive effort by 10 assessments of propulsive effort estimation unit.
Controller 1 can by propulsive effort estimation unit 10 assessment propulsive efforts, perhaps can side by side be carried out these two processes after passing threshold setting device 11 setting thresholds.
After this, determine device 12 by the propulsive effort appropriateness, controller 1 will by the propulsive effort of propulsive effort estimation unit 10 assessment with compare by threshold setting device 11 preset threshold, and determine whether that the propulsive effort of assessing is equal to or greater than threshold value (step S4).
If the propulsive effort of assessment is equal to or greater than threshold value ("Yes" among the step S4), by propulsive effort information notification apparatus 13, controller 1 glimmers the energy-saving indicating lamp that is installed on the gauge panel or opens with redness, and the propulsive effort that driver will produce has at once exceeded threshold value and will cause consumption of fuel deterioration (step S5).
On the other hand, if the propulsive effort of assessment is less than threshold value ("No" among the step S4), when energy-saving indicating lamp is when opening, by propulsive effort information notification apparatus 13, controller 1 cuts out energy-saving indicating lamp or opens with green, and the driver propulsive effort that at once will produce is less than threshold value and will can not cause consumption of fuel deterioration (step S6).
After this, determine device 12 by the propulsive effort appropriateness, by using audio output apparatus 4 and display equipment 5, controller 1 is exported the propulsive effort of assessment and the magnitude relationship between the preset threshold, and no matter the propulsive effort appropriateness is determined definite result (step S7) of device 12.
Therefore, because be illustrated in the propulsive effort of the assessment that shows on the Vehicular display device and the image of the magnitude relationship between the threshold value by observation, chaufeur always can be confirmed the motoring condition of his vehicle, and also can understand the moment that propulsive effort exceeds threshold value by energy-saving indicating lamp.So the consumption of fuel deterioration can be suppressed effectively.
With above-mentioned structure, because motoring condition assessment apparatus 100 adopts propulsive effort etc. that for each vehicle different reflection has vehicle feature as standard, be used for determining the existence of consumption of fuel deterioration, chaufeur can be notified possible consumption of fuel deterioration exactly.
In addition, because motoring condition assessment apparatus 100 adopts for each vehicle different reflection the propulsive effort etc. of vehicle feature to be arranged as standard, be used for determining the existence of consumption of fuel deterioration, look-up table (table of the corresponding relation between threshold value and the car speed is shown) can jointly be used for different vehicles.Therefore, being adopted situation as standard at accelerator opening, needn't be that each vehicle is prepared look-up table.
In addition, motoring condition assessment apparatus 100 be different from the acceleration figure that adopts actual measurement as in the situation of standard, after flat-out acceleration has been carried out the pattern of driver consumption of fuel deterioration.Motoring condition assessment apparatus 100 can be before unexpected acceleration takes place, and prior notice chaufeur consumption of fuel deterioration may take place at once.
Then, with reference to figure 5, with another structure example of explaining according to motoring condition assessment apparatus of the present invention.
Motoring condition assessment apparatus 200 is identical with motoring condition assessment apparatus 100, except following this point: in the state estimation equipment 200 that travels, value based on value, transmission gear ratio and the torque converter ratio of engine torque, propulsive effort estimation unit 10 assessment propulsive efforts, wherein the value of this engine torque is based on accelerator opening and is calculated by engine controller 30, and the value of this transmission gear ratio and torque converter ratio is based on that accelerator opening calculates by gearbox controller 31.
In the state estimation equipment 200 that travels, based on the accelerator opening that obtains by engine controller 30 and gearbox controller 31, by making the value of controller 1 computing engines moment of torsion, transmission gear ratio and torque converter ratio, propulsive effort estimation unit 10 assessment propulsive efforts.
Engine controller 30 and gearbox controller 31 all are mounted in the assembly on the engine ECU, and can be one of hardware or software or their combination.
In addition, engine controller 30 and gearbox controller 31 comprise engine control and change-speed box controllable function respectively.Engine controller 30 and gearbox controller 31 computing engines moments of torsion, transmission gear ratio and torque converter ratio are to realize their functions separately.Notice that these values are not only calculated for the assessment propulsive effort.
Under the situation of superincumbent structure, except the effect of motoring condition assessment apparatus 100, use by engine controller 30 engine torque that calculate, that be used for Control Engine and by gearbox controller 31 transmission gear ratio and torque converter ratios that calculate, that be used to control change-speed box by as-is condition, and the computing that reduction repeats, motoring condition assessment apparatus 200 applies the effect of the computational load that reduces controller 1.
Although hereinbefore, the embodiment of the invention is described in detail, the present invention is not limited to the foregoing description, and in spirit and scope of the invention, can make various modifications and change to the foregoing description.
For example, among the embodiment of Miao Shuing, motoring condition assessment apparatus 100,200 is described to be independent of the device of engine ECU in the above.Yet device 100,200 can be integrated with the part as engine ECU with engine ECU.
In addition, by use from such as the various sensors of vane anemometer, the imageing sensor and being used to that is used to detect the situation on reason surface detects the output of the obliquity sensor of reason surface gradient, motoring condition assessment apparatus 100,200 can calculate the resistance to motion (air resistance, rolling resistance, grade resistance etc.) of vehicle.By increasing when resistance to motion is big by threshold setting device 11 preset threshold, and hour reduce by threshold setting device 11 preset threshold at resistance to motion, device 100,200 can be proofreaied and correct numerical value.
Although chaufeur is just being carried out in suitable scope according to surrounding environment and quickened, the too much warning that is used to prevent the consumption of fuel deterioration is proofreaied and correct in the increase of threshold value.Reduce to proofread and correct the further lifting that is used for promoting consumption of fuel according to surrounding environment.
Motoring condition assessment apparatus 100 comprises: car speed detecting device 2, and it is constructed to detect car speed; Propulsive effort estimation unit 10, it is constructed to assess the driving operation propulsive effort of carrying out according to chaufeur that produce, that be used for powered vehicle; Threshold setting device 11, it is constructed to set based on the car speed that is detected by car speed detecting device 2 threshold value of propulsive effort; And propulsive effort information notification apparatus 13, it is constructed to driver by the propulsive effort of propulsive effort estimation unit 10 assessments and by the relation between threshold setting device 11 preset threshold.